Two others are, why do people pick the wrong targets? Can detection-like inquiry reduce this problem? This piece confirms the relevance of this problem in the pipe-bombing case. David Dayen, a prominent financial journalist (author of Chain of Title), starts with this:
Cesar Sayoc, the Donald Trump-loving Floridian who was taken into custody in relation to pipe bombs mailed to prominent Democrats, was foreclosed on in 2009 by a bank whose principal owner and chair is now Trump’s treasury secretary, Steven Mnuchin.Also relevant: this journalist's Twitter thread about the knowledge problems created by "both-sidesism," which, as we know, detectives like Sherlock Holmes scrupulously avoid.